Charles Xavier is a telepathic mutant. He started a school for young mutants that taught them how to use their powers for good. When he just discovered his powers in his teens, he met another young mutant named Erik Lensherr (who would later become Magneto), who was also discovering his powers. They were best friends until they decided to go their separate ways. Xavier then later founded the X-Men with his first five pupils: Cyclops, Iceman, Archangel, Beast, and Jean Grey. Erik, meanwhile, made his team of Acolytes. Xavier is related to Juggernaut.